#include <stdio.h>
 
void Swap(int *pa,int *pb){
    int z = 0;
    z = *pa;
    *pa = *pb;
    *pb = z;
}

int main(){
    int a = 1;
    int b = 2;
    Swap(&a,&b);
    printf("%d",a);
    printf("%d",b);
}